Class used to implement "vacuum radiation", i.e., radiation that is large where density is less than user-specified vacuum density de/dt = - C f_vacrad where f_vacrad = 0.5 * (1 - cos((T - T0) / (T1 - T0))) : T0 > T > T1 f_vacrad = 1 : T >= T1 f_vacrad = 0 : T <= T0. More...

#include <vacuum_radiation.h>

Inheritance diagram for wxm::apps::mhd::radiation::VacuumRadiation:

Detailed Description

Class used to implement "vacuum radiation", i.e., radiation that is large where density is less than user-specified vacuum density de/dt = - C f_vacrad where f_vacrad = 0.5 * (1 - cos((T - T0) / (T1 - T0))) : T0 > T > T1 f_vacrad = 1 : T >= T1 f_vacrad = 0 : T <= T0.

Here, T0 and T1 are user-specified temperature values, and the cos function provides a smooth transition of f_vacrad from 0 to 1.

The value of f_vacrad above is applied in regions with n < n_vac. The value is modified in a transition region between n_vac and n_vac * 2, by linearly ramping (in density space) from f_vacrad to 0 between n_vac and n_vac * 2. This ramp is intended to provide a gradual variation in physical space from a location with full vacuum radiation to a location with zero vacuum radiation, providing better numerical properties than a sudden transition in vacuum radiation.

The intent is that the plasma temperature can be kept below T1. However, if the value of the user-specified constant "C" is too small, the temperature may climb above T1.

Public Member Functions
	VacuumRadiation ()

	~VacuumRadiation () override

void	setup (const WxCryptSet &wxc) override

const std::vector< int > &	getInputVariableIndexes (int flag) const override

const std::vector< int > &	getOutputVariableIndexes (int flag) const override

real	source (const real q, const real aux, const elementGeometry_t pEG, real source) const override

Public Member Functions inherited from WmApplication
	WmApplication ()

virtual	~WmApplication ()=default

virtual void	setup (const WxCryptSet &wxc)

virtual const std::vector< int > &	getAuxiliaryVariableIndexes (int flag=WMAPPLICATIONFLAG_NONE) const

virtual const std::vector< int > &	getCrossVariableIndexes (int flag=WMAPPLICATIONFLAG_NONE) const

const std::vector< std::string > &	getBoundaryNames () const

bool	isOnBoundary (const std::string &boundaryName) const

bool	has (int flag) const

virtual real	numerical_flux (const real q_l, const real q_r, const real aux_l, const real aux_r, const solverVariables_t pFV, real numericalFlux) const

virtual real	internal_flux (const real q, const real aux, const solverVariables_t *pSV, std::vector< std::vector< real > > &internalFlux) const

virtual real	source (const real q, const real aux, const elementGeometry_t pEG, real source) const

virtual void	bc_q (const real q_in, const real aux_in, const real aux_out, const solverVariables_t pFV, real *q_out) const
	Boundary Condition Application which sets the boundary condition on ghost nodes.

virtual real	bcNumericalFlux (const real q_l, const real q_r, const real aux_l, const real aux_r, const solverVariables_t pFV, real numericalFlux) const

virtual void	conserved_to_primitive (const real q, const real aux, real *w) const

virtual void	primitive_to_conserved (const real w, const real aux, real *q) const

virtual void	evaluate_function (const real q, const real aux, const solverVariables_t pSV, real result) const

virtual void	bc_q_kinetic (const real q_in, const real aux_in, const solverVariables_t pFV, real q_out) const

std::shared_ptr< std::string >	app_name ()

virtual const std::vector< int > &	getInputVariableIndexes (int flag=0) const

virtual const std::vector< int > &	getOutputVariableIndexes (int flag=0) const

Protected Attributes
real	_constant
	Radiation constant [Power / volume].

real	_gas_gamma
	Ratio of specific heats.

real	_n_vac
	Vacuum density level below which vacuum radiation is applied.

real	_T0_vac
	Turn-on temperature of vacuum radiation.

real	_T1_vac
	Max-out temperature of vacuum radiation.

real	_Ai
	Proton normalized ion mass.

real	_Zi
	Ion charge.

real	_min_density
	Normalized minimum mass density.

real	_min_pressure
	Normalized minimum pressure density.

std::vector< int >	_fluid_variable_idcs

Protected Attributes inherited from WmApplication
std::string	_app_name

WxLogStream	_debStrm

std::vector< int >	_allowedFlags

std::vector< std::string >	_onBoundaries

Additional Inherited Members
Public Types inherited from WmApplication
typedef Application_Variable	WmApplication_Variable

typedef std::map< std::string, std::string >	replaceMap_t

Static Public Attributes inherited from wxm::app_base
static std::vector< int >	empty

Protected Member Functions inherited from wxm::app_base
virtual	~app_base ()=default

Constructor & Destructor Documentation

◆ VacuumRadiation()

wxm::apps::mhd::radiation::VacuumRadiation::VacuumRadiation ( )

◆ ~VacuumRadiation()

wxm::apps::mhd::radiation::VacuumRadiation::~VacuumRadiation ( )

override

Member Function Documentation

◆ getInputVariableIndexes()

const std::vector< int > & wxm::apps::mhd::radiation::VacuumRadiation::getInputVariableIndexes ( int flag ) const

inlineoverridevirtual

Reimplemented from wxm::app_base.

◆ getOutputVariableIndexes()

const std::vector< int > & wxm::apps::mhd::radiation::VacuumRadiation::getOutputVariableIndexes ( int flag ) const

inlineoverridevirtual

Reimplemented from wxm::app_base.

◆ setup()

void wxm::apps::mhd::radiation::VacuumRadiation::setup ( const WxCryptSet & wxc )

overridevirtual

Reimplemented from WmApplication.

◆ source()

real wxm::apps::mhd::radiation::VacuumRadiation::source	(	const real *	q,
		const real *	aux,
		const elementGeometry_t *	pEG,
		real *	source
	)		const

overridevirtual

Reimplemented from WmApplication.

Member Data Documentation

◆ _Ai

real wxm::apps::mhd::radiation::VacuumRadiation::_Ai

protected

Proton normalized ion mass.

◆ _constant

real wxm::apps::mhd::radiation::VacuumRadiation::_constant

protected

Radiation constant [Power / volume].

◆ _fluid_variable_idcs

std::vector<int> wxm::apps::mhd::radiation::VacuumRadiation::_fluid_variable_idcs

protected

◆ _gas_gamma

real wxm::apps::mhd::radiation::VacuumRadiation::_gas_gamma

protected

Ratio of specific heats.

◆ _min_density

real wxm::apps::mhd::radiation::VacuumRadiation::_min_density

protected

Normalized minimum mass density.

◆ _min_pressure

real wxm::apps::mhd::radiation::VacuumRadiation::_min_pressure

protected

Normalized minimum pressure density.

◆ _n_vac

real wxm::apps::mhd::radiation::VacuumRadiation::_n_vac

protected

Vacuum density level below which vacuum radiation is applied.

◆ _T0_vac

real wxm::apps::mhd::radiation::VacuumRadiation::_T0_vac

protected

Turn-on temperature of vacuum radiation.

◆ _T1_vac

real wxm::apps::mhd::radiation::VacuumRadiation::_T1_vac

protected

Max-out temperature of vacuum radiation.

◆ _Zi

real wxm::apps::mhd::radiation::VacuumRadiation::_Zi

protected

Ion charge.

The documentation for this class was generated from the following file:

src/apps/mhd/radiation/vacuum_radiation.h

Detailed Description

Public Member Functions

Protected Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ VacuumRadiation()

◆ ~VacuumRadiation()

Member Function Documentation

◆ getInputVariableIndexes()

◆ getOutputVariableIndexes()

◆ setup()

◆ source()

Member Data Documentation

◆ _Ai

◆ _constant

◆ _fluid_variable_idcs

◆ _gas_gamma

◆ _min_density

◆ _min_pressure

◆ _n_vac

◆ _T0_vac

◆ _T1_vac

◆ _Zi